One, Staff Sgt. Luis A. Walker, is accused of having sexual contact with 10 women in basic and technical training.

The Air Force has called the case the biggest of its kind ever at Lackland.

“There are others as well,” said Brent Boller, a spokesman for Joint Base San Antonio, which provides logistics for Lackland and two other installations here. “These are not connected to the Walker case.”

The latest instructors to be charged are Staff Sgts. Kwinton Estacio and Craig LeBlanc, both assigned to Lackland's 737th Training Group.

Estacio — who's accused of sexual misconduct with a female basic training student, violating a no-contact order and obstruction of justice — will face an Article 32 evidentiary hearing on the base Friday.

LeBlanc is accused of sexual misconduct with two female training students, violating a no-contact order, adultery and obstruction of justice. His Article 32 hearing will be next Tuesday.

The Air Force is not releasing the ages or hometowns of the instructors implicated in the cases, citing federal privacy law.

The growing sex scandal began nearly a year ago when the Air Force launched an investigation in the Walker case. Since then, Walker has faced an evidentiary hearing and had a jury selected in his case.

A second instructor cut a plea bargain with prosecutors and will testify in other cases.

Few details were available about the latest cases. Boller, the Joint Base San Antonio spokesman, said the Air Force said it would not release charge sheets with detailed allegations about Estacio's and LeBlanc's actions until prosecutors refer the case for court-martial.

Boller also said he didn't know and couldn't say how many more instructors were likely to be brought up on charges of having sex with trainees at Lackland.

Investigators, however, have been looking into instructor misconduct since first starting a probe into the allegations against Walker on June 24.

A seven-member jury was seated early this month to hear Walker's case when it starts July 16.

He's accused of having sex with four trainees and having improper sexual contact with others. The Air Force has charged him with rape, aggravated sexual assault, sodomy, obstruction of justice, adultery and violating the Air Education and Training Command's professional conduct code.